How to Stop Pilling on Sublimated Polo Shirts

Pilling comes from yarn quality and knit tightness — not fabric weight. For sublimated polos, choose continuous-filament polyester: it has no loose fibre ends, so it essentially cannot pill. Staple (short-fibre) polyester and cotton blends pill; anti-pilling finishes and tight knits reduce it further. Target Grade 4+ on the ASTM D3511 pilling scale.

Yarn structure decides pilling

Yarn / structure	Pilling tendency	Why
Continuous-filament polyester	Essentially none	No loose fibre ends to tangle
Staple polyester	Moderate	Short fibres rub and ball up
Combed cotton	Low	Longer fibres
Regular cotton	Higher	Short fibres
Tight knit vs loose knit	Tight pills less	Structure controls friction

The sublimation connection

Sublimation requires 85%+ polyester — which is exactly the fibre family that can be spun as continuous filament. So the technical answer to "sublimated polo pilling" is structural: buy continuous-filament polyester, and pilling largely disappears because there is nothing to pill. Staple-fibre polyester and cotton blends are the ones that develop pills between 5 and 30 washes.

The cost and the test

Anti-pilling finishing (chemical bonding, singeing, enzyme treatment) adds roughly +$0.20–0.50 per yard. Pilling is tested to ASTM D3511 / ICI Pilling on a 1 (severe) to 5 (none) scale — specify Grade 4+ in your contract. The quality timeline is visible in practice: budget-grade shirts pill at 5–10 washes, standard grade at 20–30, premium continuous-filament at 60–80 with virtually no pilling.

FAQ

1. Does polyester pill? Continuous-filament polyester essentially does not; staple polyester does. The yarn, not the fibre name, decides.

2. How is pilling tested? ASTM D3511 / ICI Pilling, scored 1 (severe) to 5 (none); Grade 4+ is the pass standard.

3. Does higher GSM mean less pilling? No — yarn quality and knit tightness decide, not weight.

4. Can a sublimated polo be made pilling-resistant? Yes — use continuous-filament polyester (85%+ poly for sublimation anyway) and optionally an anti-pilling finish.

5. How much does anti-pilling finishing cost? About +$0.20–0.50 per yard.

6. When do pills normally appear? Budget-grade at 5–10 washes, standard at 20–30; premium continuous-filament stays clean to 60–80 washes.

Related reading

What Is the Best Fabric for Golf Polo Shirts?

Sublimated polos in continuous-filament polyester — view polos

References

ASTM D3511 (pilling resistance); AISNUG finishing-process cost records, 2026.